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ASTM A234 WPB的理化性能

发布时间:2015-12-29 点击数:8148

ASTM A234 WPB是最常见的ASME B16.9碳钢对焊管件材料

 

化学成分Chemical Compositions   ( max,  % )

钢级Grade

A

WPB 

B,C,D,E,F

C

0.30

Mn

0.29-1.06

P

0.050

S

0.058

Si

≥0.10

Cr

0.40

Mo

0.15

Ni

0.40

Cu

0.40

V

0.08

A 当管配件为焊接结构时,上述级别号及标志号应添加字母“W”。When fittings are of welded construction, the grade and marking symbol shown above shall be supplemented by letter “W”.
B 由棒料或板料制成的管配件,含碳量最大可为0.35。Fittings made from bar or plate may have 0.35 max carbon.
C 由锻件制成的管配件,含碳量最大可为0.35,含硅量最大可为0.35,且无最小值限制。Fittings made from forgings may have 0.35 max carbon and 0.35 max silicon with no minimum.
D 当含碳量在规定的最大含碳量以下时,每降低0.01%碳,含锰量可在规定的最大含量以上递增0.06%,直至最大含锰量为1.35%For each reduction of 0.01 % below the specified carbon maximum, an increase of 0.06 % manganese above the specified maximum will be permitted, up to amaximum of 1.35 %.
E 铜、镍、铬和钼的总含量总和应不超过1.00%。The sum of Copper, Nickel, Chromium, and Molybdenum shall not exceed 1.00 %.
F 铬和钼的总含量应不超过0.32%。The sum of Chromium and Molybdenum shall not exceed 0.32 %.

 

拉伸性能 Tensile Requirements

钢级Grade 

WPB

抗拉强度范围Tensile strength, range ksi [MPa]

60–95
 [415–655]

最小屈服强度
Yield strength, min, ksi [MPa] (0.2 % offset or 0.5 % extension-under-load)

35 [240]

 

伸长率Elongation

延伸率Elongation:

WPB

纵向

Longitudinal

横向

Transverse

标距为4D的标准圆形试样或小尺寸比例试样的最小值Standard round specimen, or small proportional specimen, min % in 4 D

22

14

5/16inch(7.94mm)及其以上壁厚的矩形试样,和所有在全截面下试验的小尺寸试样,标距为2inch50mm
Rectangular specimen for wall thickness 5⁄16 in. [7.94 mm] and over,and for all small sizes tested in full section; min % in 2 in. [50 mm]

30

20 A

5/16inch7.94mm)以下壁厚的矩形试样, 标距为2inch50mm)(试样宽1/2inch12.7mmRectangular specimen for wall thickness less than 5⁄16 in. [7.94 mm];min % in 2 in. [50 mm] (1⁄2-in. [12.7-mm] wide specimen)

B

B

 A 由板料制成的WPB和WPC管件最小延伸率为17%。WPB and WPC fittings manufactured from plate shall have a minimum elongation of 17 %.

 B 允许从上列伸长率值上,对于壁厚在5/16inch(7.94mm)以下的,每减薄1/32inch(0.79mm),纵向伸长率递减1.5%及横向伸长率递减1.0%。下表给出不同壁厚的最小值。For each 1⁄32 in. [0.79 mm] decrease in wall thickness below 5⁄16 in. [7.94 mm], a deduction of 1.5 % for longitudinal and 1.0 % for transverse from the values shown above is permitted. The following table gives the minimum value for various wall thicknesses.

壁厚Wall Thickness

WPB

in.

[mm]

纵向

Longitudinal

横向

Transverse

5⁄16 (0.312)

7.94

30

20

9⁄32 (0.281)

7.14

28.5

19

1⁄4 (0.250)

6.35

27

18

7⁄32 (0.219)

5.56

25.5

3⁄16 (0.188)

4.76

24

5⁄32 (0.156)

3.97

22.5

1⁄8 (0.125)

3.17

21

3⁄32 (0.094)

2.38

19.5

1⁄16 (0.062)

1.59

18

 

硬度 Hardness- 最高197HB

 

 

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